Occurrence of aromatic cytokinins in oil palm (Elaeis guineensis Jacq.) |
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Authors: | L H Jones H Martinková M Strnad D E Hanke |
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Institution: | (1) Department of Plant Sciences, University of Cambridge, CB2 3EA Cambridge, UK;(2) Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Sokolovská 6, 77200 Olomouc, CR;(3) Present address: 17 Marriott's Close, MK43 7HD Felmersham, Bedford, UK |
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Abstract: | The natural occurrence of 6-benzylaminopurine, 6-(2-hydroxybenzylamino)purine (ortho-topolin), 6-(3-hydroxybenzylamino)purine (meta-topolin), their ribosides and 9-glucosides is reported using specific antibodies to these groups of compounds in high performance liquid chromatography/enzyme-linked immunosorbent assay (HPLC/ELISA). Compounds were identified by their retention times and differential cross-reactivities with six antisera in analyses carried out in two laboratories using different HPLC gradient systems. Identities were confirmed by immunoaffinity purification followed by HPLC with on-line UV spectrum analysis. Further confirmation of the occurrence of ortho-topolin riboside and isopentenyladenine-9-glucoside was obtained from gas chromatography-mass spectrometry analysis of permethylated HPLC fractions of an extract of oil palm tissues. The aromatic cytokinins, and in particular, ortho-topolin riboside, were found in a variety of oil palm tissues at concentrations exceeding those of the isoprenoid cytokinins, zeatin, isopentenyladenine, dihydrozeatin, and their ribosides. The 9-glucosides of isopentenyladenine and zeatin were more abundant than those of the aromatic types. The cross-reactivity of benzyladenine compounds with antibodies to isopentenyladosine is discussed in relation to the interpretation of ELISA data.Abbreviations BA
N
6-benzyladenine
- HPLC
high performance liquid chromatography
- ELISA
enzyme-linked immunosorbent assay
- GC-MS
gas-chromatography-mass spectrometry
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mT
meta-topolin
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oT
ortho-topolin
- TEAA
triethylammonium acetate
- IAC
immunoaffinity chromatography
- SPD
spectral photodiode |
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Keywords: | Oil palm Cytokinin Topolin |
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